Dimensions of piston?

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Gingerbread Man
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Dimensions of piston?

Post by Gingerbread Man »

I am looking for the dimensions of the piston for the NQ50 and SA50. I order a new piston kit for my Zuma and received the wrong piston and rings. Pictures are a plus, please include weight in grams if possible. Somehow I ended with a 40.50 piston and rings stamped 1.50 over. If the dimensions match I'll bore your cylinder to match the piston for a reasonable price. To clarify the piston I have is 40.50. Trafficjamz can you hook me up?
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Re: Dimensions of piston?

Post by mousewheels »

'94 up Elite SA50 is 39.0mm piston, 12mm pin. Spree, SB50, variated AF05 engines - Aero50 (85-87), Elite SS and SA50 to '93 are 41.0 mm stock pistons, 10mm pin.
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Re: Dimensions of piston?

Post by Gingerbread Man »

Great info mousewheels. Mine is a 10mm piston boss. What I'm looking for is the height of the piston. And the Spree is 41.00mm also. Dose this look like a Honda piston? The one on the right.
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Re: Dimensions of piston?

Post by mousewheels »

Hmm...Pin looks low for a Honda Spree or early SA50 with a 10mm pin. Top of pin to top edge of piston is about 0.575"
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Re: Dimensions of piston?

Post by Trafficjamz »

39mm af16e stock piston 58.2g on my scale

41mm nq50 stock piston 50.8g on my scale
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Re: Dimensions of piston?

Post by Trafficjamz »

the one on the right looks like a elite S piston
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Re: Dimensions of piston?

Post by eliteguy50 »

Where did you order from? Yami dealer, Honda dealer, after market?
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Re: Dimensions of piston?

Post by Gingerbread Man »

Do you have a picture of the Elite s piston?

I ordered from Autotech355 on ebay. Carlos sent me a new kit and I get to keep the wrong kit.
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Re: Dimensions of piston?

Post by Gingerbread Man »

mousewheels wrote:Hmm...Pin looks low for a Honda Spree or early SA50 with a 10mm pin. Top of pin to top edge of piston is about 0.575"
Thanks, mine is 24.50mm.
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Re: Dimensions of piston?

Post by Trafficjamz »

Image

Image

Image

.86 inches = 21.84400 millimeters
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Re: Dimensions of piston?

Post by Gingerbread Man »

I was measuring from the top of the crown when I had 24.50mm. I believe we have now measured in the same location and came up with equal numbers. If our numbers are correct I'll say these are the same piston.
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Re: Dimensions of piston?

Post by mousewheels »

You guys took nearidentical photos. Wee bit of scaling and we have this :D
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Re: Dimensions of piston?

Post by Trafficjamz »

mousewheels wrote:You guys took nearidentical photos. Wee bit of scaling and we have this :D
Wow that is weird :confused:

My piston only weighs 58.2 grams. Yours is 64.5 grams. I wonder why that is?

I hope you use that scale to weigh other peoples bags :naughty:
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Re: Dimensions of piston?

Post by Gingerbread Man »

mousewheels wrote:You guys took nearidentical photos. Wee bit of scaling and we have this :D
Awesome!

I think it weighs more because it's bigger?

I weigh lots of things on that scale. Like pistons, my pre-mix oil and rollers to name a few. :thumbwink:
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Re: Dimensions of piston?

Post by Trafficjamz »

Yours is not a 39mm stock piston?
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